<template>
  <div class="login">
    <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
      <h3 class="title">后台管理系统</h3>
      <el-form-item prop="username">
        <el-input v-model="loginForm.username" type="text" size="large" auto-complete="off" placeholder="账号">
          <template #prefix>
            <svg-icon icon-class="user" class="el-input__icon input-icon" />
          </template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input v-model="loginForm.password" type="password" size="large" auto-complete="off" placeholder="密码"
          @keyup.enter="handleLogin">
          <template #prefix>
            <svg-icon icon-class="password" class="el-input__icon input-icon" />
          </template>
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaOnOff">
        <el-input v-model="loginForm.code" size="large" auto-complete="off" placeholder="验证码" style="width: 63%"
          @keyup.enter="handleLogin">
          <template #prefix>
            <svg-icon icon-class="validCode" class="el-input__icon input-icon" />
          </template>
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getCode" class="login-code-img" />
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" class="login-checkbox">记住密码</el-checkbox>
      <el-form-item style="width:100%;">
        <el-button :loading="loading" size="large" type="primary" style="width:100%;" @click.prevent="handleLogin">
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2018-2022 lansoft All Rights Reserved.</span>
    </div>
  </div>
</template>

<script lang="ts" setup >
import { ref } from 'vue'
import { useRouter } from 'vue-router'
import { getCodeImg } from "@/api/login"
import Cookies from "js-cookie"
import { encrypt, decrypt } from "@/utils/jsencrypt"
import { useUserStore } from '@/store/user'

const userStore = useUserStore();
const router = useRouter();

const loginForm = ref({
  username: "admin",
  password: "admin123",
  rememberMe: false as Boolean,
  code: "",
  uuid: ""
});

const loginRules = {
  username: [{ required: true, trigger: "blur", message: "请输入您的账号" }],
  password: [{ required: true, trigger: "blur", message: "请输入您的密码" }],
  code: [{ required: true, trigger: "change", message: "请输入验证码" }]
};

const codeUrl = ref("");
const loading = ref(false);
// 验证码开关
const captchaOnOff = ref(true);

const redirect = ref(undefined);
const loginRef = ref(null)

function handleLogin() {
  loginRef.value.validate((valid: boolean) => {
    if (valid) {
      loading.value = true;
      // 勾选了需要记住密码设置在cookie中设置记住用户明和名命
      if (loginForm.value.rememberMe) {
        Cookies.set("username", loginForm.value.username, { expires: 30 });
        Cookies.set("password", encrypt(loginForm.value.password), { expires: 30 });
        Cookies.set("rememberMe", loginForm.value.rememberMe, { expires: 30 });
      } else {
        // 否则移除
        Cookies.remove("username");
        Cookies.remove("password");
        Cookies.remove("rememberMe");
      }
      // 调用action的登录方法
      userStore.Login(loginForm.value)
        .then(() => {
          router.push({ path: redirect.value || "/index" });
        })
        .catch(() => {
          loading.value = false;
          // 重新获取验证码
          if (captchaOnOff.value) {
            getCode();
          }
        });
    }
  });
}

function getCode() {
  getCodeImg().then((res) => {
    captchaOnOff.value = res.captchaOnOff === undefined ? true : res.captchaOnOff;
    if (captchaOnOff.value) {
      codeUrl.value = "data:image/gif;base64," + res.img;
      loginForm.value.uuid = res.uuid;
    }
  });
}

function getCookie() {
  const username = Cookies.get("username");
  const password = Cookies.get("password");
  const rememberMe = Cookies.get("rememberMe");
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: password === undefined ? loginForm.value.password : decrypt(password),
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
    code: '',
    uuid: ''
  };
}

getCode();
getCookie();
</script>

<style lang='scss' scoped>
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/login-background.jpg");
  background-size: cover;
}

.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #2d2d2d;
}

.login-form {
  width: 400px;
  padding: 25px 25px 5px 25px;
  text-align: center;
  border-radius: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  border-left: 1px solid rgba(255, 255, 255, 0.4);
  background: linear-gradient(to top right,
      rgba(174, 215, 255, 0.7),
      rgba(183, 201, 226, 0.6));
  box-shadow: 10px -10px 20px rgba(0, 0, 0, 0.2),
    -10px 10px 20px rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  /*  元素后面区域添加模糊效果 */
  z-index: 10;
  // border-radius: 20px;
  // transform: rotate(-15deg);

  .el-input {
    height: 40px;

    input {
      height: 40px;
    }
  }

  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 0px;
  }
}

.login-checkbox {
  float: left;
  margin: 0px 0px 20px 0px;
}

.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}

.login-code {
  width: 33%;
  height: 40px;
  float: right;

  img {
    cursor: pointer;
    vertical-align: middle;
  }
}

.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}

.login-code-img {
  height: 40px;
  padding-left: 12px;
}
</style>